CN109918733A - A kind of double-fed fan motor unit electro-magnetic transient equivalent modeling method and device - Google Patents
A kind of double-fed fan motor unit electro-magnetic transient equivalent modeling method and device Download PDFInfo
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Abstract
The invention discloses a kind of double-fed fan motor unit electro-magnetic transient equivalent modeling methods, it include: the topological structure according to double-fed fan motor unit analogue system, establish double-fed fan motor unit electromagnetic transient simulation model, according to the electric connecting relation of each module of the analogue system, admittance array element element and the node Injection Current source of the analogue system are obtained；The history Injection Current of the Equivalent Model is sought according to the Equivalent admittance battle array, obtains system equivalent model；By system equivalent model and external electrical network simultaneous solution, the branch current of the node voltage of each electrical node and each model inside double-fed fan motor unit is obtained；The history Injection Current source of next emulation each module of time step is calculated according to the node voltage and branch current of this time step simultaneously；According to branch current and node voltage, non-electrical part is solved；Judge whether next emulation time step updates admittance array element element.It solves the problems, such as and model when bulk power grid associative simulation is complicated, simulation step length is limited, simulation velocity is slow.
Description
Technical field
This application involves Simulating technique in Electric Power System, and in particular to a kind of double-fed fan motor unit electro-magnetic transient equivalent modeling side
Method, while being related to a kind of double-fed fan motor unit electro-magnetic transient equivalent modeling device.
Background technique
The double-fed fan motor unit electromagnetic transient simulation model structure modeled in detail is complete, can reflect Wind turbines comprehensively
Response characteristic.It includes multiple links such as pneumatic, mechanical, electrical, power electronic equipment and control and protection system, if with big electricity
Detailed electromagnetic transient simulation model is used when net associative simulation, then there is model is complicated, simulation step length is limited, simulation velocity is slow etc.
Problem, if multiple units access power grid is carried out emulating the problem and will more be protruded.Therefore, it is necessary to study double-fed fan motor units to connect
Enter electromagnetic transient simulation Equivalent Simplification model when power grid, the module not high to attention rate in simulation analysis carries out appropriate equivalent
Substitution, while reducing simulation calculation order and electrical calculate node.Currently, in the dynamic simplification modeling side of double-fed fan motor unit
Face simplifies double-fed fan body in machine-electricity transient model, circuit operation can not be protected correctly to be sentenced Crowbar
It is disconnected, directly affect its external characteristics；It is to be equivalent to inverter and connected capacitors part that electrical-magnetic model, which simplifies existing method,
Controlled voltage source has ignored DC capacitor part, can not transient characterisitics to DC bus and Chopper protection circuit control,
Crowbar protection switching process is emulated；Meanwhile correlation is not carried out to double-fed fan motor unit electro-magnetic transient equivalent modeling and is ground
Study carefully.
Summary of the invention
The application provides a kind of double-fed fan motor unit electro-magnetic transient equivalent modeling method, solves and bulk power grid associative simulation
When model is complicated, simulation step length is limited, simulation velocity is slow problem.
The application provides a kind of double-fed fan motor unit electro-magnetic transient equivalent modeling method characterized by comprising
According to the topological structure of double-fed fan motor unit analogue system, double-fed fan motor unit electromagnetic transient simulation model is established,
The double-fed fan motor unit electromagnetic transient simulation model includes double-fed asynchronous generator electrical-magnetic model, the equivalent electromagnetism of inverter
Transient Model, DC capacitor electrical-magnetic model, filter electrical-magnetic model and non-electric quantity model；
According to the electric connecting relation of each module of the analogue system, the admittance array element element and section of the analogue system are obtained
Point Injection Current source；
Three port Impedance battle arrays are obtained using the system equivalent electrical impedance that impedance equivalent method seeks access power grid port, by impedance
Battle array invert obtain etc. valve systems adjoint admittance battle array；
Nodal voltage equation is established according to the admittance battle array of analogue system and node Injection Current source and seeks double-fed fan motor machine
The open-circuit voltage of group electrical system；The history Injection Current that the Equivalent Model is sought according to the Equivalent admittance battle array is
System Equivalent Model；
By system equivalent model and external electrical network simultaneous solution, the node of each electrical node inside double-fed fan motor unit is obtained
The branch current of voltage and each model；Each mould of next emulation time step is calculated according to the node voltage and branch current of this time step simultaneously
The history Injection Current source of block；According to branch current and node voltage, non-electrical part is solved；Judging next emulation time step is
No update admittance array element element.
Preferably, the double-fed fan motor unit electromagnetic transient simulation model includes double-fed asynchronous generator electrical-magnetic model
With the equivalent electrical-magnetic model of inverter, double-fed asynchronous generator electrical-magnetic model and the equivalent electrical-magnetic model of inverter
Establishment process specifically includes:
According to stator and rotor voltage equation and flux linkage equations, the equivalent electro-magnetic transient of double-fed asynchronous generator perseverance admittance battle array is established
Model；
According to switch function equivalent circuit, establish Crowbar protection circuit switching, converter blocking transient process it is controlled
Source type inverter equivalent model derives the equivalent electrical-magnetic model of inverter according to the inverter equivalent model.
Preferably, the equivalent electrical-magnetic model of the double-fed asynchronous generator, inverter, it is adjoint in normal work to lead
Element of receiving immobilizes.
Preferably, described by system equivalent model and external electrical network simultaneous solution, obtain each electricity inside double-fed fan motor unit
The node voltage of moral point and the branch current of each model, comprising:
By system equivalent model and external electrical network simultaneous solution, port node voltage is obtained；
Port node voltage is equivalent to ideal voltage source, double-fed fan motor unit electrical-magnetic model is substituted into, utilizes node
Voltage equation seeks the node voltage of each electrical node inside double-fed fan motor unit；
According to the electrical-magnetic model of internal each electrical module, the branch current of each model is sought.
Preferably, it is injected according to the history that the node voltage of this time step and branch current calculate next emulation each module of time step
Current source；After calculating each model branch current and node voltage step, non-electrical part is solved, non-electrical part includes power
Partially, converter Control and protection three parts.
Preferably, the power section includes wind speed, wind power, award setting, shafting model, which is electrical mould
Type provides machine torque, while to take input system active power as control input quantity；
The converter Control part includes phaselocked loop, net side converter Control and pusher side converter Control, which is
Inverter equivalent model provides modulation voltage, while network voltage, stator voltage, electric current and rotor voltage, electric current being taken to change to net side
Flow device control and pusher side converter Control；
The protection portion point includes Chopper protection and Crowbar protection, which makees DC voltage and rotor current
Judgement reference is controlled for protection, the switching conversion of the part directly affects the variation of electric topology structure.
Preferably, further include；
Divide action situation according to protection portion, judges whether the admittance battle array each element of the inside of double-fed fan motor unit updates, if
Each admittance array element element of new internal node is then sought in update；If internal each model admittance battle array does not update, enters and wait valve systems
With external electrical network simultaneous solution step.
The application provides a kind of double-fed fan motor unit electro-magnetic transient equivalent modeling device simultaneously characterized by comprising
Model foundation unit establishes double-fed fan motor unit for the topological structure according to double-fed fan motor unit analogue system
Electromagnetic transient simulation model, the double-fed fan motor unit electromagnetic transient simulation model include double-fed asynchronous generator electro-magnetic transient mould
The equivalent electrical-magnetic model of type, inverter, DC capacitor electrical-magnetic model, filter electrical-magnetic model and non-electric quantity mould
Type；
Admittance array element element and node Injection Current source acquiring unit, for electrically connecting according to each module of the analogue system
Relationship is connect, admittance array element element and the node Injection Current source of the analogue system are obtained；
With admittance battle array acquiring unit, for seeking the system equivalent electrical impedance of access power grid port using impedance equivalent method
Obtain three port Impedance battle arrays, by Impedance Matrix invert obtain etc. valve systems adjoint admittance battle array；
System equivalent model acquiring unit, for establishing node according to the admittance battle array and node Injection Current source of analogue system
Equation and the open-circuit voltage for seeking double-fed fan motor unit electrical system；The Equivalent Model is sought according to the Equivalent admittance battle array
History Injection Current obtains system equivalent model；
Unit is solved, it is each inside double-fed fan motor unit for obtaining system equivalent model and external electrical network simultaneous solution
The branch current of the node voltage of electrical node and each model；Under being calculated simultaneously according to the node voltage and branch current of this time step
The history Injection Current source of one emulation each module of time step；According to branch current and node voltage, non-electrical part is solved；Judgement
Whether next emulation time step updates admittance array element element.
The application provides a kind of double-fed fan motor unit electro-magnetic transient equivalent modeling method, proposes a kind of based on double-fed asynchronous hair
The double-fed fan motor unit electromagnetism of the motor equivalent electrical-magnetic model of perseverance admittance battle array and inverter switch function average value equivalent model
Transient state equivalent modeling method.The Equivalent Model is not restricted by simulation step length, and interface circuit only has 3 calculate nodes, in unprotect
It is not necessary to modify admittance array element element is calculated when switching is converted, simulation velocity is improved；Unit external characteristics can not only be simulated simultaneously,
The electrical and mechanical property for each link in inside for considering that circuit switching is protected in Chopper protection, Crowbar can be simulated.
Detailed description of the invention
Fig. 1 is a kind of double-fed fan motor unit electro-magnetic transient equivalent modeling method schematic diagram provided by the embodiments of the present application；
Fig. 2 be the invention relates to double-fed asynchronous generator electrical-magnetic model schematic diagram；
Fig. 3 be the invention relates to inverter equivalent model electrical-magnetic model schematic diagram；
Fig. 4 be the invention relates to double-fed fan motor unit Equivalent Model schematic diagram；
Fig. 5 be the invention relates to double-fed fan motor unit equivalent modeling simulation flow schematic diagram；
Fig. 6 is a kind of double-fed fan motor unit electro-magnetic transient equivalent modeling schematic device provided by the embodiments of the present application.
Specific embodiment
Many details are explained in the following description in order to fully understand the application.But the application can be with
Much it is different from other way described herein to implement, those skilled in the art can be without prejudice to the application intension the case where
Under do similar popularization, therefore the application is not limited by following public specific implementation.
Fig. 1 is please referred to, Fig. 1 is a kind of double-fed fan motor unit electro-magnetic transient equivalent modeling side provided by the embodiments of the present application
Method is described in detail method provided by the embodiments of the present application below with reference to Fig. 1.
Step S101 establishes double-fed fan motor unit electro-magnetic transient according to the topological structure of double-fed fan motor unit analogue system
Simulation model, the double-fed fan motor unit electromagnetic transient simulation model include double-fed asynchronous generator electrical-magnetic model, the change of current
The equivalent electrical-magnetic model of device, DC capacitor electrical-magnetic model, filter electrical-magnetic model and non-electric quantity model.
The present invention proposes a kind of based on the equivalent electrical-magnetic model of double-fed asynchronous generator perseverance admittance battle array and inverter switch
The double-fed fan motor unit electro-magnetic transient equivalent modeling method of mean value functions equivalent model.Following (the specific stream of specific implementation step
Journey is shown in Fig. 5):
It is temporary to establish double-fed asynchronous generator perseverance admittance battle array electromagnetism according to three-phase stator and rotor voltage equation and flux linkage equations by S1
States model, according to Motor convention, 90 ° of the advanced d axis of q axis, the equivalent electrical-magnetic model of stator side perseverance admittance battle array:
Gsus(n)=Js=-(kjussus(n-1)+kjissis(n-1)+kjisrir(n-1)-GsGsr_invir(n)) (1)
Wherein, usIt is stator terminal voltage, isIt is the electric current for flowing to stator, urIt is rotor-end voltage, irIt is the electricity for flowing to rotor
Stream,
LlsFor stator leakage inductance；rsFor stator resistance, θrFor the spatial position between rotor a phase axis and stator a phase axis
Angle.LmsFor the mutual inductance value of stator corresponding to the maximum mutual flux that interlinks with one phase winding of stator；ωrIt is rotor speed, dq
Magnetizing inductance L under reference axism=1.5Lms.H is simulation step length, and α is damped coefficient, related to numerical integration algorithm (take 0~
1, trapezoidal method 0, Euler method 1).
The permanent equivalent electrical-magnetic model of admittance battle array of rotor-side:
Grur(n)=Jr-(kjurrur(n-1)+kjirrir(n-1)+kjirsis(n-1)-GrGrs_invis(n)) (2)
Wherein,
rrRotor resistance, LlrFor rotor leakage inductance, Lmr=
Lms.Double-fed asynchronous generator electrical-magnetic model (Fig. 2) is derived to formula (1) and formula (2), when normal work is solid with admittance element
It is fixed constant.
Wherein, Gas、Gbs、GcsIt is stator side with admittance element, Jas、Jbs、JcsIt is stator side with injection historical current
Source；Gar、Gbr、GcrIt is rotor-side with admittance element, Jar、Jbr、JcrIt is rotor-side with injection historical current source.
S2, according to switch function equivalent circuit, the thought equalized using switch function is established and considers that Crowbar is protected
The controlled source type inverter equivalent model of protection circuit switching, converter blocking transient process.
When not considering converter blocking, loss is equivalent to RL branch and moves to exchange side, is equivalent to controlled potential source and controlled
Stream source form, wherein controlled voltage source may be expressed as: in equivalent model
Wherein, Ma、Mb、McIt is modulation voltage A, B, C phase of converter Control system output, udcFor DC voltage.
Controlled current source may be expressed as:
Wherein, ua、ub、ucIt is controlled source phase voltage, ia、ib、icIt is exchange side phase current.
When converter blocking, being equivalent to diode can not control rectifying circuit.
The equivalent electrical-magnetic model of inverter (Fig. 3) is derived based on the above circumstances, it is solid with admittance element when normal work
It is fixed constant.Ga、Gb、GcIt is by the corresponding adjoint admittance of RL branch, Ja、Jb、JcIt is RL corresponding with injection historical current source.It closes
When lock, each diode is by variable resistance Ron/RoffModel parallel connection RC buffer circuit is equivalent, and the change of disconnection condition is connected according to it
Variable resistance.
Step S102 obtains the admittance of the analogue system according to the electric connecting relation of each module of the analogue system
Array element element and node Injection Current source.
S3 establishes complete double-fed wind according to double-fed fan motor unit analogue system (hereinafter referred to as " system ") topological structure
Motor group electric part electromagnetic transient simulation model seeks system according to the electric connecting relation of each module of the analogue system
Admittance array element element GijWith node Injection Current source Ji(node serial number that i, j are respectively electric part).
Step S103 obtains three port Impedances using the system equivalent electrical impedance that impedance equivalent method seeks access power grid port
Battle array, by Impedance Matrix invert obtain etc. valve systems adjoint admittance battle array.
S4. three port Impedance battle arrays are obtained using the system equivalent impedance that impedance equivalent method seeks access power grid portImpedance Matrix is inverted to the equivalence that can obtain system with admittance battle array Gsw。
Step S104 establishes modal equation according to the admittance battle array of analogue system and node Injection Current source and seeks double-fed wind
The open-circuit voltage of motor group electrical system；The history Injection Current that the Equivalent Model is sought according to the Equivalent admittance battle array, is obtained
Obtain system equivalent model.
S5. do not include external electrical network, using system admittance battle array and node Injection Current establish nodal voltage equation seek it is double
Present the open-circuit voltage U of Wind turbines electrical systemoc, utilize the Equivalent admittance battle array G in S4swSeek the history note of the Equivalent Model
Enter electric current Jsw=Gsw*Uoc, obtain system equivalent model (Fig. 4).
Step S105 obtains system equivalent model and external electrical network simultaneous solution each electrical inside double-fed fan motor unit
The branch current of the node voltage of node and each model；It is calculated simultaneously according to the node voltage and branch current of this time step next imitative
The history Injection Current source of each module of true time step；According to branch current and node voltage, non-electrical part is solved；Judge next
Whether emulation time step updates admittance array element element.
S6. the valve systems such as general and external electrical network simultaneous solution, obtain port node voltage Usw.Port voltage is equivalent to manage
Think voltage source, substitutes into the double-fed fan motor unit electrical-magnetic model in S3, seek double-fed fan motor unit using nodal voltage equation
The node voltage of internal each electrical node seeks the branch electricity of each model according to the electrical-magnetic model of internal each electrical module
Stream.The history Injection Current source of next emulation each module of time step is calculated according to the node voltage and branch current of this time step simultaneously.
S7. non-electrical part solves, including power section, converter Control and protection three parts.Power section includes wind
Speed, wind power, award setting, shafting model, which provides machine torque for electrical model, while to take input system to have
Function power is as control input quantity；Converter Control part includes phaselocked loop, net side converter Control and pusher side converter Control,
The part provides modulation voltage for inverter equivalent model, while taking network voltage, stator voltage, electric current and rotor voltage, electric current
To net side converter Control and pusher side converter Control.Protection portion point includes Chopper protection and Crowbar protection, the part
Judgement reference is controlled using DC voltage and rotor current as protection, the switching conversion of the part directly affects electric topology structure
Variation.
S8. divide action situation according to protection portion, judge that the admittance battle array each element of the inside of double-fed fan motor unit updates?
Each admittance array element element of new internal node is sought if updating, and returns again to step S4.If internal each model admittance battle array does not update,
Step S4 is skipped, step S5 is passed directly to, is circuited sequentially into next emulation time step.
The application provides a kind of double-fed fan motor unit electro-magnetic transient equivalent modeling device 600 simultaneously, which is characterized in that packet
It includes:
Model foundation unit 610 establishes double-fed fan motor machine for the topological structure according to double-fed fan motor unit analogue system
Group electromagnetic transient simulation model, the double-fed fan motor unit electromagnetic transient simulation model includes double-fed asynchronous generator electro-magnetic transient
The equivalent electrical-magnetic model of model, inverter, DC capacitor electrical-magnetic model, filter electrical-magnetic model and non-electric quantity
Model；
Admittance array element element and node Injection Current source acquiring unit 620, for the electricity according to each module of the analogue system
Gas connection relationship obtains admittance array element element and the node Injection Current source of the analogue system；
With admittance battle array acquiring unit 630, for seeking the system equivalent electricity of access power grid port using impedance equivalent method
Impedance obtain three port Impedance battle arrays, by Impedance Matrix invert obtain etc. valve systems adjoint admittance battle array；
System equivalent model acquiring unit 640, for according to the admittance battle array of analogue system and the foundation of node Injection Current source
Modal equation and the open-circuit voltage for seeking double-fed fan motor unit electrical system；The equivalent mould is sought according to the Equivalent admittance battle array
The history Injection Current of type obtains system equivalent model；
Unit 650 is solved, for obtaining system equivalent model and external electrical network simultaneous solution inside double-fed fan motor unit
The branch current of the node voltage of each electrical node and each model；It is calculated simultaneously according to the node voltage and branch current of this time step
The history Injection Current source of next emulation each module of time step；According to branch current and node voltage, non-electrical part is solved；Sentence
Whether next emulation time step of breaking updates admittance array element element.
The application provides a kind of double-fed fan motor unit electro-magnetic transient equivalent modeling method, proposes a kind of based on double-fed asynchronous hair
The double-fed fan motor unit electro-magnetic transient of motor perseverance admittance battle array electrical-magnetic model and inverter switch function average value equivalent model
Equivalent modeling method.The Equivalent Model is not restricted by simulation step length, and interface circuit only has 3 calculate nodes, in unprotect switching
It is not necessary to modify admittance array element element is calculated when conversion, simulation velocity is improved；Unit external characteristics can not only be simulated simultaneously, also can
Simulation considers that the electrical and mechanical property of each link in inside of circuit switching is protected in Chopper protection, Crowbar.
The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, although referring to above-described embodiment pair
The present invention is described in detail, those of ordinary skill in the art still can to a specific embodiment of the invention into
Row modifies perhaps equivalent replacement and these exist without departing from any modification of spirit and scope of the invention or equivalent replacement
Apply within pending claims of the invention.
Claims (8)
1. a kind of double-fed fan motor unit electro-magnetic transient equivalent modeling method characterized by comprising
According to the topological structure of double-fed fan motor unit analogue system, double-fed fan motor unit electromagnetic transient simulation model is established, it is described
Double-fed fan motor unit electromagnetic transient simulation model includes double-fed asynchronous generator electrical-magnetic model, the equivalent electro-magnetic transient of inverter
Model, DC capacitor electrical-magnetic model, filter electrical-magnetic model and non-electric quantity model；
According to the electric connecting relation of each module of the analogue system, the admittance array element element and node note of the analogue system are obtained
Enter current source；
Three port Impedance battle arrays are obtained using the system equivalent electrical impedance that impedance equivalent method seeks access power grid port, Impedance Matrix is asked
The adjoint admittance battle array of the valve systems such as inverse acquisition；
Nodal voltage equation is established according to the admittance battle array of analogue system and node Injection Current source and seeks double-fed fan motor unit electricity
The open-circuit voltage of gas system；The history Injection Current of the Equivalent Model, acquisition system etc. are sought according to the Equivalent admittance battle array
It is worth model；
By system equivalent model and external electrical network simultaneous solution, the node voltage of each electrical node inside double-fed fan motor unit is obtained
With the branch current of each model；Next emulation each module of time step is calculated according to the node voltage and branch current of this time step simultaneously
History Injection Current source；According to branch current and node voltage, non-electrical part is solved；Whether more to judge next emulation time step
New admittance array element element.
2. the method according to claim 1, wherein the double-fed fan motor unit electromagnetic transient simulation model includes
Double-fed asynchronous generator electrical-magnetic model and the equivalent electrical-magnetic model of inverter, double-fed asynchronous generator electrical-magnetic model
It is specifically included with the establishment process of the equivalent electrical-magnetic model of inverter:
According to stator and rotor voltage equation and flux linkage equations, the equivalent electrical-magnetic model of double-fed asynchronous generator perseverance admittance battle array is established；
According to switch function equivalent circuit, the controlled source type of Crowbar protection circuit switching, converter blocking transient process is established
Inverter equivalent model derives the equivalent electrical-magnetic model of inverter according to the inverter equivalent model.
3. the method according to claim 1, wherein the equivalent electromagnetism of the double-fed asynchronous generator, inverter
Transient Model immobilizes with admittance element in normal work.
4. the method according to claim 1, wherein described ask system equivalent model and external electrical network simultaneous
Solution obtains the branch current of the node voltage of each electrical node and each model inside double-fed fan motor unit, comprising:
By system equivalent model and external electrical network simultaneous solution, port node voltage is obtained；
Port node voltage is equivalent to ideal voltage source, double-fed fan motor unit electrical-magnetic model is substituted into, utilizes node voltage
Equation seeks the node voltage of each electrical node inside double-fed fan motor unit；
According to the electrical-magnetic model of internal each electrical module, the branch current of each model is sought.
5. the method according to claim 1, wherein under being calculated according to the node voltage of this time step and branch current
The history Injection Current source of one emulation each module of time step；After calculating each model branch current and node voltage step, to non-electrical
Part solves, and non-electrical part includes power section, converter Control and protection three parts.
6. according to the method described in claim 5, it is characterized in that,
The power section includes wind speed, wind power, award setting, shafting model, which provides machinery for electrical model
Torque, while to take input system active power as control input quantity；
The converter Control part includes phaselocked loop, net side converter Control and pusher side converter Control, which is the change of current
Device equivalent model provides modulation voltage, while network voltage, stator voltage, electric current and rotor voltage, electric current being taken to give net side inverter
Control and pusher side converter Control；
It includes Chopper protection and Crowbar protection that the protection portion, which is divided, and the part is using DC voltage and rotor current as guarantor
Shield control judgement reference, the switching conversion of the part directly affect the variation of electric topology structure.
7. according to the method described in claim 6, it is characterized in that, further including；
Divide action situation according to protection portion, judge whether the admittance battle array each element of the inside of double-fed fan motor unit updates, if updating
Then seek each admittance array element element of new internal node；If internal each model admittance battle array does not update, equal valve systems and outer are entered
Portion's power grid simultaneous solution step.
8. a kind of double-fed fan motor unit electro-magnetic transient equivalent modeling device characterized by comprising
Model foundation unit establishes double-fed fan motor unit electromagnetism for the topological structure according to double-fed fan motor unit analogue system
Transient simulation model, the double-fed fan motor unit electromagnetic transient simulation model include double-fed asynchronous generator electrical-magnetic model,
The equivalent electrical-magnetic model of inverter, DC capacitor electrical-magnetic model, filter electrical-magnetic model and non-electric quantity model；
Admittance array element element and node Injection Current source acquiring unit, for being closed according to the electrical connection of each module of the analogue system
System, obtains admittance array element element and the node Injection Current source of the analogue system；
With admittance battle array acquiring unit, the system equivalent electrical impedance for seeking access power grid port using impedance equivalent method is obtained
Three port Impedance battle arrays, by Impedance Matrix invert obtain etc. valve systems adjoint admittance battle array；
System equivalent model acquiring unit, for establishing modal equation according to the admittance battle array and node Injection Current source of analogue system
And seek the open-circuit voltage of double-fed fan motor unit electrical system；The history of the Equivalent Model is sought according to the Equivalent admittance battle array
Injection Current obtains system equivalent model；
Unit is solved, it is each electrical inside double-fed fan motor unit for obtaining system equivalent model and external electrical network simultaneous solution
The branch current of the node voltage of node and each model；It is calculated simultaneously according to the node voltage and branch current of this time step next imitative
The history Injection Current source of each module of true time step；According to branch current and node voltage, non-electrical part is solved；Judge next
Whether emulation time step updates admittance array element element.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112131716A (en) * | 2020-09-02 | 2020-12-25 | 南京航空航天大学 | Random electromagnetic transient analysis method and system for power electronic power system |
| CN112688358A (en) * | 2020-11-19 | 2021-04-20 | 中国电力科学研究院有限公司 | Double-fed wind turbine generator electromagnetic transient simulation starting method based on dual-mode switching |
| CN112861300A (en) * | 2019-11-27 | 2021-05-28 | 中车株洲电力机车研究所有限公司 | Multi-converter distributed grid-connected system simulation method and related device |
| CN113435150A (en) * | 2021-05-26 | 2021-09-24 | 中国长江三峡集团有限公司 | Equivalent circuit and electromagnetic transient simulation method of double-fed wind driven generator |
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| CN112688358B (en) * | 2020-11-19 | 2023-08-25 | 中国电力科学研究院有限公司 | Double-mode switching-based electromagnetic transient simulation starting method for double-fed wind turbine generator |
| CN113435150A (en) * | 2021-05-26 | 2021-09-24 | 中国长江三峡集团有限公司 | Equivalent circuit and electromagnetic transient simulation method of double-fed wind driven generator |
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